Environmental and Sensor Limitations in Optical Remote Sensing of Coral Reefs: Implications for Monitoring and Sensor Design
Environmental and Sensor Limitations in Optical Remote Sensing of Coral Reefs: Implications for Monitoring and Sensor Design
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DOI：
10.3390/rs4010271
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发表时间：
2012-01
期刊：
影响因子：
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通讯作者：
J. Hedley;C. Roelfsema;S. Phinn;P. Mumby
中科院分区：
文献类型：
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作者：
J. Hedley;C. Roelfsema;S. Phinn;P. Mumby
根据环境成分和成像传感器配置，开发了一种分析水生系统光学遥感能力的通用方法。该方法以整个系统的组件模型为基础，其中不仅底栖生物组成，而且其他环境组件，如水的固有光学特性、水深、太阳高度、风速和传感器噪声特性，都由可能包括跨图像变化的数据集定义。将该模型应用于来自太平洋珊瑚礁的空中传感器数据，以估计混淆区分主要珊瑚礁类型的海底混合物的主要环境或传感器因素：活珊瑚、漂白珊瑚、死珊瑚和大型藻类。结果表明，底栖生物类型的光谱变化和亚像素混合是影响底栖生物制图目标的主要限制因素，而仪器噪声水平是次要因素。
A generic method was developed for analysing the capabilities of optical remote sensing of aquatic systems in terms of environmental components and imaging sensor configurations. The method was based on a component based model of the entire system in which not only benthic composition but other environmental components such as water inherent optical properties (IOPs), bathymetry, sun elevation, wind speed and sensor noise characteristics were defined by datasets with the potential to include across-image variation. The model was applied to data from Pacific Ocean reefs in an airborne sensor context to estimate the primary environmental or sensor factors confounding discrimination of benthic mixtures of key reef types: live coral, bleached coral, dead coral and macroalgae. Results indicate that spectral variation of benthic types and sub-pixel mixing is the primary limiting factor for benthic mapping objectives, whereas instrument noise levels are a minor factor.